A　modern　industrial　process　is　more　and　more　complex.　There　is　no　satisfactory　effect　controlled　by　traditional　strategy　and　methods　in　complex　control　system;　while　single　intelligent　method　is　difficult　to　adapt　to　the　global　control　for　such　kind　of　system.　First,　the　characteristic　and　application　are　introduced.　Then　through　the　comparison　between　Fieldbus　Control　System　(FCS)　and　Multi-Agent　theory,　the　comparability　on　technical　characteristic　and　architectural　characteristic　could　predicate　that　FCS　is　the　genetic　platform　of　Multi-Agent　theory.　A　three-layer　composite　Multi-Agent　control　network　used　for　complex　industrial　process　is　constructed　based　on　PROFINET　industrial　Ethernet　technology.　©2009　IEEE.